Tuber oblate-spheroid. Stem and branchlets slender. Leaves pedately 5-7-foliolate; petiole 4.5-7 cm, glabrous or pubescent; leaflets obovate-lanceolate to narrowly lanceolate, median leaflets 8-17 × 2-4 cm; petiolule 3-5 mm. Male flowers dichotomously cymose; peduncle 4-10 cm, slightly flexuous; calyx segments lanceolate, ca. 4 × 2-3 mm; corolla yellow-green, bowl-shaped or Chinese lanternlike, 6-12 mm in diam.; segments ovate, ca. 6 × 4 mm, apex reflexed. Female inflorescence reduced; ovary ovoid or subglobose, ca. 3 mm in diam. Fruit ovoid or ellipsoid, 3-4 × 3-3.5 cm. Seeds almost circular, compressed, 10-13 × 10-13 mm, almost unwinged, margin 2-3 mm wide. Fl. Jun-Sep, fr. Aug-Nov.

● Broad-leaved forests, forest margins; 700-2100 m. Chongqing, Sichuan.